An ordinary college student, Lee Seol (Kim Tae Hee), finds out she's a princess and the great-granddaughter of the Joseon Dynasty's last Emperor, Emperor Sunjong.

The grandson of the chairman of Daehan Group, Park Hae Young (Song Seung Heon), is put in charge of educating Seol on proper etiquette in order for her to fulfill her role. However, Hae Young is put in a precarious situation when he finds himself drawn to Seol, the girl who will take away his inheritance if the monarchy is restored.